I think 21mm is wide enough in most cases of creative photography. So enjoy the lense. The photos show that it works great on distortion suppression. Maybe someday when you get its 14mm, you'll think it is over-wide. LOL
I think it might be possible that nikon would stop production of all the primes from 14mm to 24mm since its new 14-24mm is just amazing in all respects-- distortion, resolution, CA, etc. but at a price more than a d300 body.......not many can afford